Multi-scale gas discharge simulations using asynchronous adaptive mesh refinement |
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Authors: | Thomas Unfer,Jean-Pierre Boeuf,Franç ois Rogier |
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Affiliation: | a Université de Toulouse, UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d'Energie), 118 route de Narbonne, F-31062 Toulouse cedex 9, France b CNRS, LAPLACE, F-31062 Toulouse, France c ONERA, 2 avenue Edouard Belin, 31400 Toulouse, France d Université de Toulouse, ISAE, 10 avenue Edouard Belin, 31055 Toulouse cedex 4, France |
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Abstract: | The breakdown of a gas gap at high products of pd (pressure × distance) is a multi-scale phenomenon in both time and space. This is especially true when the plasma is interacting with a gas flow, a problem of considerable recent interest in the context of aerodynamic applications of surface discharges. This paper presents a contribution to the numerical modeling of such discharges. We describe here a new approach for adaptive meshing which is suitable for use with the explicit asynchronous integration scheme described in our previous publication. Rather than relying on a family of nested grids as is commonly done, this technique is based on a single unstructured mesh with possible non-conforming cells at the interface between coarse and fine areas. Substantial computational time saving has been achieved for a surface dielectric barrier discharge configuration of the kind proposed as plasma actuators for flow control. |
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Keywords: | Multi-scale Asynchronous Transport problem Local time stepping Gas discharges CFL condition Adaptive mesh refinement |
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